There is a market for premium WP themes and plugins. And, now that people are using WP as a CMS more and more and not just blog software it will grow even fast

There is a market for premium WP themes and plugins. And, now that people are using WP as a CMS more and more and not just blog software it will grow even faster. Take a look at themeforest.net or go to elance.com and see how many people are hiring plugin developers.